Edit multiple meshes at once?
There is an addon called MultiEdit, that will enable you to edit multiple objects at once.
Here is the post on blender artists where the download can be found.

After you have installed and activated the addon, you just select the objects that you want to edit together, and click on the MultiEdit Enter button in the tool shelf.
Then when you are done, toggle back out of edit mode and click on the MultiEdit Exit button.